William j



(No Model.)

W. J BAYRER'. SHEARS FOR METAL. 7 No. 372,784.. Patented Nov. 8,-1887.

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UNITED STATES PATENT EFIcE.

WILLIAM J. BAYRER, or SOUTHINGTON, CONNECTICUT, ASSIGNOR TO THE PEGK, srow a wiLcoX COMPANY, or SAME PLACE.

SHAEARS FOR METAL.

SPECIFICATION forming part of Letters Patent No. 372,784, dated November 8, 1887.

Application filed August 1, 1887. Serial No. 245,799. (No model.)

To all whom, izkmay concern:

Be itknown that I, WILLIAM J. BAYRER, a

citizen of the United States, residing at Southington, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Shears, of which the following is a specification. My improvement relates to the class of shears that have a fixed blade and a vertically-reciprocating blade, which are used for cutting sheet metal.

The object of myimprovement is to provide a tool that will operate more effectually, with greater facility, that is capable of finer ad- I 5 justment, and that can be used to cut metal Figure 1 is a side view of my improved device. Fig. 2 is aplan view of the same. Fig. 3 is a face view of the blades, part of the plate bearing the cutter being broken away to show construction. Fig. 4 is a detail view showing the means employed to connect the table or rest to the bed of the device,- and Fig. 5 is a detail view, the frame being sectioned on line an moi Fig. 1, showing the stops made use of to regulate the length of cut to be made by the blades.

As illustrated in the drawings, the standard 12 rises from the bed a of the machine at one end,and hasa forward-projecting arm or horn, c, the standard being secured to the bed by bolts 1), which pass through slots in the base of the standard into the bed.

In the forward 'end of the horn c, in a suitable chamber, a shaft, d, is borne,and this shaft has on one side, near its outer end, teeth d,

that mesh with a rack, e, that is fastened to the cutter-bearing plate 6. This cutter-bearing cated in a vertical plane toward and from the complementary cutter f that is secured to the bed ofthe machine by screws that pass through slots in the blade into the bed.

In threaded sockets in lugs a that rise from the rear of the bed a, are fitted screws a, so as to bear upon the back ofthestandard b, and by the aid of these screws the horn,and blade borne on the end of the horn, can be pushed forward and a fine adjustment obtained be tween the blades f and f the bolts 12, as was before mentioned, passing through slots in the standard to permit this movement of the standard.

.The lever g, which is .keyed or otherwise connected so as to rock the shaft d, extends on both sides of the horn,passingthrough an opening therein, and it is provided withahandle, g, at one end and a counterbalancing-weight, g", at the other. This lever is tapped near the point of its connection with the shaft, and is provided with screws 9" that are set in such position as to limit the oscillating movement of the lever by striking against the surface 0 on the walls of the opening through the horn c, this construction limiting the movement of the lever, consequently the rocking movement of the shaft and the reciprocating motion of the blade f.

The forward end of the bed a is provided with a hollow boss, at", and ears to, the function of the boss being to receive the stud if, that projects from the leg h on the bottom of the rest or table 72, and the function of the cars a being to support the legs h which are cut away to fit on the ears. These ears are so formed on the bed that the top of the rest, when in place,will be about even with the cutterf and inclined to the same degree, so that a sheet of metal will be flat on the rest when ready to be cut.

The guide 2 is pivotally connected at one end of the rest h, and can be clamped at any desired angle with relation to the plane of the shears by tightening up the clamp-screw and nutj, the body of the screw passing through the guide and slot 71., and the head projecting on the under side of the rest. The function of this guide t is to direct a sheet of metal toward the blades of the shears, so as to make an angular cut and insure the same angle each time.

On the opposite side of the rest is pivoted another guide, 7:, the pivot of this guide passing through a slot, a so as to permit an adjustment of the guide toward or from the guide i. One edge of this guide k is cut on an angle,

when the guides are set as shown in the drawings for use in cornering roofing-plates.

XVhen a straight out is to be n1ade,tlie guide Z is used to support one edge of the 1netal,also to determine the width of the strip to be cut. This guide Z-is a flanged strip of material attached to the end of a rod, Z, that is borne in a socketin aboss, l-', formed on the side of the standard. This rod is free to slide in the socket in the boss, except when clamped by the set-screw l.

In cutting on a line it facilitates the work greatlyif the blades do not open widely apart, although it is sometimes necessary that they should open clear of each other; and one of the advantages of my improvement resides in the fact that the distance of separation of the blades is controlled by a simple and efficient device. The screw 9" is screwed or unscrewed to determine the degree of height to which the blade willrise, and the screw g" turned to control and limit the downward movement of the said blade. Another advantage lies in the fact that the action of the cutters is positive and equal in all parts of the length of the out. A further advantage accrues from the simplicity of the guides and gages and their ready adjustment, also the ease with which the rest can be removed or I replaced for cutting straight lines, or for cutting various shapes, the latter being accomplished by setting the guides on the index-lines shown on the face of the rest.

A few of the shapes that can readily be out with my shears are as follows: holes or plates of hexagon, octagon, pentagon, starshaped. square, round, and oval, or other shapes. 1

,can also cut a series of V-shaped slots of a given size and uniform angles. In cutting holes the lower corner of the blade f will puncture the metal at the commencement of each cut.

The lower blade of the shears is stationary, so that when cutting to line the mark may easily be followed with accuracy. The blades are so constructed that the line drawn is always exposed to the view of the operator.

I claim as myinvention 1. In shears of the within-described class,

the combination of a reciprocating blade, a shaft connected to said blade, and a lever to oscillate said shaft, provided with adjustable stops, all substantially as described.

2. In shears, the combination of a base, a horn projecting from said base, a shaft borne by the born, a lever to oscillate said shaft, stops to limit said oscillation, a blade connected to said shaft, and a fixed blade attached to the bed, all substantially as described, and for the purpose set forth.

3. In shears, the combination of a base, a horn projecting from said base, screws for adjusting said horn, a shaft borne by the horn and provided with gear-teeth, a lever attached to said shaft and bearing screw-stops to limit the movement of the shaft, a blade bearing a rack in mesh with the teeth on the shaft and held to the horn andguided in its reciprocationby a tongue and-groove connection, and a complementary adjustable blade fast to the bed, all substantially as described.

4. In combination with a reci p rocatingshears of the within-described class, a rest detaehably connected to the bed and provided with a swinging guide,i,allsubstantially as described, and for the purpose set forth.

5. In combination with shears of the within-described class, a rest attached to said shear and provided with a swinging guide, 1', and a guide, It, all substantially as described.

6. In shears, in combination, a bed, astandard rising from said bed, a horn projecting from the standard, screws a for adjusting the standard, a shaft borne in a chamber in said horn, a lever provided with adjustable stops connected to said shaft, a plate connected to the horn by a tongueand-groove joint and bearing a rack with teeth in mesh with teeth on the shaft, a blade attached to said plate, thecomplementary cutter fast to the bed, the gage Z, the rest l1,with feet It and h, the swinging guide 2' and the adjustable guide In, all substantially as described, and for the purpose set forth.

7. In shears, the combination of the bed having the cutter f secured thereto, and having also the ears a a and hollow boss at adjoining said cutter, and the table h,havinglegs h h and stud h",fitted, respectively, to said ears and boss, substantially as described, and for the purpose specified.

WILLIAM J. BAYRER.

\Vitnesses E. E. YTON, Hm]; S. GRANNIS. 

